image overlap message for exposure 1 of trigger 922107
uvot_overlap.pl vrs. 2010-12-20b fem started at 190824d20h07m45s213379usUT
The observation of trigger 922107 started 2019-08-24T14:56:31.1
Examining file ./922107_g591_uvot_sky_image.fits
The exposure ID is 588351391
The exposure time is 149.879 (seconds)
The filter is WHITE.
The uvot region is centered at (215.3228,-41.9006) with a roll angle of 297.4
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (215.3290,-41.9020) with a radius of 3.000 arc min
This is 0.289 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (215.3049,-41.8938) with a radius of 0.025 arc min
This is 0.896 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 922107
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190824d20h07m50s413960usUT
Observation start time is 2019-08-24T14:56:31.1
Examining file ./922107_g591_uvot_catalog_image.fits
The exposure ID is 588351391
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 35 detected source(s) for 922107_g591
Aspect correction adds -0.00078 degrees (-0.186 sec of time = -2.08 arc sec) to RA
Aspect correction adds 0.00028 degrees ( 1.02 arcsec) to Dec
Total aspect correction is 2.31 arcsec
Star catalogs centered at 215.3196 , -41.8998 with radius 3.00 arc min.
n_usno: 250 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.96854
RA DEC Mag Color
bright star 0: 215.35333 (14:21:24.80) -41.93113 (-41:55:52.1) 10.97 USNO-V
Mean distance difference (CAT_DELTA) for 36 matched entries is 0.432" for 922107_g591
Mean and std. dev of mag. difference (MAG_DELTA) are 1.013 and 0.402 for 922107_g591
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 922107_g591.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=215.3290 (14:21:18.96) DEC=-41.9020 (-41:54:07.2)
XRT distances are from RA=215.3049 (14:21:13.18) DEC=-41.8938 (-41:53:37.8)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
215.3050 -41.8923 5.5 -1 USNO-B1 15.73 14.48 15.04
The closest star is 5.48" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=215.30492 (14:21:13.18) dec=-41.89227 (-41:53:32.2) +/- 0.6" mag=15.82+/-0.14 dist=5.6 REFID=8 flag=0
There are 61597.258 counts in the bkg source region of 4833.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.745 counts/pixel (5-sig UL in 4" is 19.97 mag) for 922107_g591
There are 7638.8838 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 38.194 counts/pixel for 922107_g591
XRT source is too far (53.7522516327838") from center -- do not compute local background.
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.52, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 922107_588351391_190824d20h07m50s413960usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(215.3228,-41.9006,45")
fk5;-circle(215.306974665712,-41.9031972869479,6")
fk5;-circle(215.319233410263,-41.8934548264532,6")
fk5;-circle(215.313835987006,-41.9028179165792,6")
fk5;-circle(215.319558267985,-41.8977190171916,6")
fk5;-circle(215.322193821708,-41.8945274727173,6")
fk5;-circle(215.322082658504,-41.8922587293125,6")
fk5;-circle(215.321386787192,-41.899091344848,6")
fk5;-circle(215.316781009327,-41.9041960568744,6")
fk5;-circle(215.313270971866,-41.9070601800168,6")
fk5;-circle(215.309702967652,-41.9096236601461,6")
fk5;-circle(215.313570879672,-41.9092658374205,6")
fk5;-circle(215.320473118633,-41.9086736868925,6")
fk5;-circle(215.317431646714,-41.9117975020796,6")
fk5;-circle(215.332106755506,-41.9016998563474,6")
fk5;-circle(215.33391065504,-41.8955756405817,6")
fk5;-circle(215.333881117793,-41.8998086291232,6")
Region file: 922107_588351391_190824d20h07m50s413960usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(215.30492,-41.89383,8")
image paragraph message for exposure 1 of trigger 922107
SRCLIST PROBLEM: srclist filled telemetry buffer
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190824 (Swift/BAT trigger 922107) at 14:46:39 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 568 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.12.
------- notes for trigger 922107 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190824d20h07m54s477528usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=922107
-expid=588351391 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/922107/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 588351391.10534 or about 2019:236:14:56:26 UT
Found 1069 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 39 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 35 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 0 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.52 mag. Found 246 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 18% of the Genie image region.
Genie image analysis:
Found 61597.3 counts in the large background region of 4833.0 pixels or a rate
of 12.745 counts/pixel in a radius of 45.0 arcsec. Based on this background,
the typical 5-sigma UL at a random point in the Genie image is 19.97 mag. for a
4-arcsec aperture.
Found 7638.9 counts in the XRT position region of 200.0 pixels or a rate of
38.194 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 33.932 +/- 0.587 (1-sigma) cps or
15.95 mag and a range from 15.93 to 15.97 mag. The 3-sigma UL at the XRT
position is 35.693 cps or 15.90 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.28 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 215.3049 dec= -41.8924 mag=15.87 sep=5.15".
The closest srclist source has ra= 215.3049 dec= -41.8924 mag=15.87 sep=5.15".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 215.3049 dec= -41.8923 mag=15.82 sep=5.61". The closest Genie
source has ra= 215.3049 dec= -41.8923 mag=15.82 sep=5.61".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 568 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:21:13.18 = 215.30492
DEC(J2000) = -41:53:32.2 = -41.89227
with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.61
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.82 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.12.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
588351391 567 WHITE srclist found no candidates.
588351391 567 WHITE image found no candidates.
List afterglow candidates for other finding charts.
588351700 876 WHITE srclist found no candidates.
588351700 876 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -41.89383
GRB_ERROR: 5
GRB_RA: 215.30492
IMAGE_START_TIME: 14:56:26
MAGNITUDE: 15.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT